819121122 has 48 divisors (see below), whose sum is σ = 1928459520. Its totient is φ = 250322400.

The previous prime is 819121109. The next prime is 819121151. The reversal of 819121122 is 221121918.

819121122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28029 + ... + 49232.

It is an arithmetic number, because the mean of its divisors is an integer number (40176240).

Almost surely, 2^819121122 is an apocalyptic number.

819121122 is an abundant number, since it is smaller than the sum of its proper divisors (1109338398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819121122 is a wasteful number, since it uses less digits than its factorization.

819121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77319 (or 77316 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 819121122 is about 28620.2921368738. The cubic root of 819121122 is about 935.6556439268.

The spelling of 819121122 in words is "eight hundred nineteen million, one hundred twenty-one thousand, one hundred twenty-two".